Multiple-drilling- machine



MULTIPLE DHILLING MACHINE A Filed Dec. l, 1919 9 Sheets-Sheet l (1% W5 "El, Q@

ggf@

imwefeaw Aug. 21, 1923.

E. S. SEAVEY MULTIPLE DRILLING MACHINE Filed Dec. l

1919 9 Sheets-Sheet Z5 E. S. SEAVEY MULTIPLE DRILLING MACHINE Aug. 2, 1923.

Filed Dec. l, 1919 9 Sheets-Sheet '7 E. 5. SEAVEJY MULTIPLE DRILLING MACHINE Filed Dec. l, 1919 9 Sheets-Sheet 9 lll Patented Aug. 21, 1923.V

ELMER S. SEA'VEY, OF JOHNSTOWN, PENNSYLVANIA.

MULTIPLE-DRILLING MACHINE.

Application filed December l, 1919.

To all w 7mm it may concern Be it known that l, Emma S. Snavnr, a citizen oi the United States, and residing in the city ot Johnstown, in the county of Cambria and State ot Pennsylvania, have invented certain new and useful Improvements in lllultiple-Drilling Machines; and l do hereby declare the following to be a full,

clear, and exact description ot the invention, 10 such as will enable others skilled. in the art to which it appertains to make and use the same.

My invention relates to a machine for drilling rolled metal shapes, such as railway rails, angles, I-beains, channels, flats, round and the like, and is more especially adapted tor use in the perforation of railway rails, just after they have been rolled and hot-sawcd and while still in a red hot or heated condition, although l wish 'it undcrstood that my improved drilling machine is equally applicable tor drilling cold metal shapes either with one hole, or a plurality oi holes at the same time as desired. 5 Hcretofore it has been customary after a railway rail bar leaves the final or finishing roll pass tor it to be received on a roller iced table at the side of which it is held stationary for a few seconds and cut into the de` sii-ed lengths by means ot rotary hot saws. Alter having cut the railway rail bar into the desired lengths the rails are conveyed to a hot-bed to cool, after cooling, the ends of the rails are chipped or milled to remove the burred edges ot' the ends ot the rails caused by hot-sawing, and the rails are then conveyed to a drilling machine where holes are drilled near the ends of cach rail, through which the rail splicing joints bolts pass when the ends of the rails are spliced together to torni a railway track.

The above manner of finishing the rails requires considerable handling and loss ot time and labor, and it is the object oi? my invention to reduce the time and labor required to finish a railway rail section and thereby reduce the cost ot production.

An object of my invention is to provide a machine with means whereby the drills are advanced and retracted quickly and at Serial No. 341,653.

the same time the drills are rotated at high speed, to prevent tearing of the metal as the drills pass through the bar being drilled.

Another object ot my invention is the manner l have of providing a main central stationary driving gear for rotating a plurality of drill spindle driving gears arranged around the periphery of the main driving gear and mounted in movable journal bearings whereby they may be thrown into or out of mesh with the main driving gear, by means oit' which I can drive one or a plurality of drill spindles as dew sired.

A further object of my invention relates to arranging two reciprocating carriages side by side having a plurality of adjustable drill spindle bearings mounted thereon, and having a central gage or stop which may be either laterally adjustable or stationary upon the work receiving table. By this arrangement, when the drill spindle bearings are adjusted on the two carriages to give the proper spacing for the holes to be drilled, the front end of one rail can be drilled by the drills carried by the bearings on one, carriage and the rear end of another rail may be drilled by the drills carried by the bearings on'the other carriage. ln this way two ends of rails may be drilled by one operator at the same time or separate-ly as desired.

Another object ot my .inif'ention relates to controlling the speed ol' the torward move ment of the drills during the drilling operation, whereby the drills may be advanced very quickly, as is required when drilling hot rolled bars, to prevent the drills troni .losing their temper, or comparatively 'slow when cold hars are drilled and adjustable means ttor retracting the carriages at the end ol' the working stroke to the position they will assume at the comn'iencement ot the working stroke.

A further object ot my invention relates to the nie-ans l have Jfor adjusting the drills upon laterally adjustable carriages with means lor adjusting the stroke oi the carriages longitudinally.

Another object ot my invention relates to advancing by fluid pressure the carriages upon which the spindle bearings are mounted.

Another object of my invention resides in the construction ot the clamping and releasing members and the manner I have of adjustably attaching the-tace of the clamping members thereto.

Still another object ot my invention relates to the adjustable spring holding ineinbers for the movable clamping jaws.

Other objects ot my invention will appear hereinafter.

Iilaving thus given a general description oit my invention I' will now, in order to malte the saine more clear, reifer to the accompanying nine sheets of drawings in which like characters oll reference indicate like parts Figure 1 is a top plan view of one 'form ot my 'improved machine7 the rail being fed into the machine in an upright or standing position; with its web vertical, showing two reciprocating` carriages havingsets ot drill spindles and bearings adjustably mounted thereon7 with a single means tor driving the two sets ol? drill spindles mounted in a stationary pinion housing and having universal shaft connections between the driving mechanism and the drill spindles.

Figure 2 is a side elevation ot the machine shown in Figure 1. K

Figure 3 is aI vertical transverse sectional elevation through the pinion housing taken on the line III-III ot' Figure Z1- drawn on a larger scale.

Figure fl is a rear elevation of the pinion housing.

Figure 5 is a vertical transverse sectional elevation of a portion ot' the machine showing more particularly the reciprocating carriagcs and their adiacent parts, taken on line V-V oit Figure 6.

Figure 6 .is a vertical longitudinal sectional elevation taken on the line VI-eVI ot Figure 5.

Figure 7 is a vertical longitudinal sectional elevation ot one of the bearings for the adjustable clamping members.

Figure 8 is vertical longitudinal sectional elevation taken on the same line as Figure 6. but showing a modification of the carriage construction.

Figure't) is a side elevation ot' one ot the journal bearings. and a portion of the carriage to wl'iich it is attached, the lower part ot the bearing being shown in section to more clearly show its construction.

Figure 10 is a longitudinal sectional elevation through the drill spindle bearing takenon the line X-X oi' Figure 9.

Figures 1l and 12 show two setcions taken on the same line as Figure 10 but illustrating modili'ed forms o'l bearings whichI may use.

Figure 13 is a transverse sectional elevation through one of the universal coupling heads taken on the line XIII-XIII of Figure 11. Y

Figure 1a is a vertical transverse sectional elevation taken on the line XIV- XIV of Figure 2, showing in elevation the work receiving table with fixed clamping block mounted thereon.

Figure 15 is a vertical sectional elevation through the work receiving table taken on the line XV-XV of Figure ,1f-l.

Figure 16 is a vertical sectional elevation Athrough the work receiving table, the section being taken on a line with one of the holes bored by my improved machine.

Figure 17 is a transverse section through one ot the movable clamping jaws.

Figure 18 is a vertical longitudinal sectional elevation of a portion ot the work receving table taken on the line XVIII- XVIII of Figure 15.

Figure 19 is a detail view showing a motor and bevel gear connection which I may use with al modified form of machine shown in Figure 20.

Figure 2O is a front elevation illustrating a modilied form of my improved machine in which the rail is fed into the machine on its side, with the web of the rail horizontal7 the carriages being reciprocated vertically by fluid pressure. the drill spindles for each carriage being driven by separate motors and pinion housings andhaving a central gage or stop on the work receiving table which is movable transversely ot the worlr receiving table but not laterally thereon.

Figure 21 illustrates in detail the bevel gear connection used with the motor drive shown in Figure 19.

Figure 22 is a vertical transverse sectional elevation through a modified tori/n of stationary clamping head which I mav use with my modified Jform ot machine 'shown in Fi gure- 20.

Figure 23 is a side elevation ot one ot'. the pinion gear housings used with the machine .illustrated in Figure 20.

Figure 24 illustrates in top plan the ll'luid pressure controllingY mechanism for reciprocating the carriages.

Figure 25 is avertical sectional elevation taken on the line `XXV-XXV ot Figure 23.

Figure 26 isa vertical transverse sectional elevation taken centrally through the wor( receiving' table of the machine shown in Figure 20.

Figure'Q'r' illustrates in detail the controlling lever.

Figure QSshows in detail the link connections between one oi" the controlling valves and one otthe operating shafts.

Figure 29 is a Vvertical transverse sectional elevation. taken centrally through .a Y

tahle similar to that shown in Figure 26, but illustrating a modilied torni et' gage controlling` means therefor.

Figure 30 illustrates a modified arrangement for the pinion driving mechanism, and

Figure is a vertical sectional elevation of the controlling` valves.

listening; now to the characters of reiterence on the drawings and espec-i ally to Fig;- ures l to 18 inclusive, the numeral l indicate the side-bas trame of the maehine, 2 the rear end thereof and 3 the front of the trame-work oit 'the machine, upon which is mounted the work receiving;` table. The end nails 2 and 3 oit the machine are attached tegether by means of holts at the bottom edges of `he side-base iframes l, and near their top side edges by the top side 'frames 4l, each having outwardly ilangied edges 5 and slide-ways 6. The top side 'trames are connected together internedia ely thereot by two cross-ties 7, for supporting the ends o'l central slide-way member S, having flanged edges 9 and slideways l0.

Reciprocating carriages 1l and l2, oi similar construction and operation are mounted on the slide-ways 6 and l0, each having an adjustable tace plate 13, seated in a dovetailed recess lll.. on the 'fase of each ot the carriages. These tace plates 1S are adjustable transverselyY oi the machine by screwtln'eaded shafts l5, engaging; the screwthreaded nuts 1G, projecting trom the face plates and the ends oi" said shafts are ournaled in the carriages l1 and l2 respectively and operated by means ot hand wheels 17. lilxtendin;i i-'rom the central portion oi' the top ot the tace plat-e 15%, is a dovetailed projection i8, extending` into dovetailed grooves in the underside ot the drillspindle journal bearings 19. The. drill-spindle journal bearings l5) are adjustable laterally ot the machine by means ot al hand wheel 20, having a sl'iatt 2l journaled in the lower portion ot the chill-spindle journal hearing il), upon which is mounted inv an opening' tlierethrough a pinion 22, meshing` with a rack on top ol the dove-tailed projeetion i8. Aglter adjustment the drill-spindle journal bearings i9 are further held in the desired position by means oli set bolts 24;, as ele-.arly shown in lfipjnre oli the drawings.

25 indicates the drill-spini'lles, each having' a drill socket att-:relied to its vforward end, which may be ol any approved and well known Construction as shown. A Collar 2G is Yloi=i.ied integrally on the drill-spindle shaft and as illustrated in Figure l0, abuts against the end oiZ the inner cone ot' a Timken .roller bearing Q7, and is adjustably held in position by nuts 2S and 29, serewed upon the drill-spindle shalft. The rear end of the drill-spindle shaft also supported by a Timlen roller bearingl and held in position by a nut 3l and the dust cap 32, which also acts as a loe nut and a similar dust cap 33 is attached. to the 'forward side of the bearing, through which the drill-spindle sha-'ft passes.

ln Figure l1 l have shown a drill-spindle journal bearing` Sel ot a. slightly modilied form, in which l use ball bearings 35, instead of rollerI bearings, and. in Figure l2, l have illustrated a drill-spindle journal hearing 3G, in which l use another' form ot ballbearings 87, otherwise it will be noted all ot the bearings are similar. lt will also he noted that although .l have shown the nuts 28 and 29 for securing; one side of the roller or ball bearings in position l' may in some cases dispense with them altogether and rely upon the collar 2.6, and the wall ot the drillspindle ournal bearing' and use the nuts 3l and dust caps 32, 'for adjustment.

To' the rear end ot the drill spindle-shaft 25, ig keyed a universal coupling` head :'38, between the hit'urcated ends of which, are two blocks P39, oit similar construetion having groovesv lor the reception ol the head ot stud Ll0 land the stud-pin ll, and. a hole therethrough as at 4t2, t'or the bolt d3. rllhe stud l0 andthe stud-pin ll extend into holes in the bifureated ends of the universal coupling head and held in position by the holt 43, which passes through the biturcated end ot the coupling-shalt lf-l and the two blocks 3S), and has one end screwed into one ot the biturcated ends oi" the coupling-shaft 44'-, as will be clearly understood by referring' to Figures ll, l2 and 13 oiE 'l'.ie drawings.

The coupling-shaft 441-, has an inner shalt 45, and `the two telescope together and have a spline 46, which allows them to slide onel within the other and to rotate together similar universal oint is made between the rear end of shalt l5 and the trent end oi" the drill-spindle driving; shaiit l? )y mains of the universal. coupling heads i-8 and 49 respectively.

The pinion housing` is mounted upon a hed plate and bolted or otherwise secured thereto and comprises a casting' having a Yfront wall 5l, with Haneed side walls z nd base flanges 53, formed integrally therewith, and a rear wall 5a. made olE a tiat plate which is attached to the front wall casting` by means ot bolts 55. i

Slide-ways 56 are 'lormed in the tirent casting` of the pinion housing` `tor the reeeption oit the journal bearings 57, tor the drill-spindle driviim shat't il-.7. rllhese bearing' inemhei's 5T. are hi'lin'cated at 58, cen-- trally. to allow tor a pinion to he mounted lli.

upon the drivin;Y sha'lt Lvl-T. rllhe bearing' members have outwardly evtenduie bosses on each side ot the bitureated Central portion 58, as at GO. which extend through slotted openings 6l in the front and rear screwed within the endg of the bosses and retain the bear Lr-,gs in place therein. These flfimlceu roller bearings*Yorin the journal bearings for the drill-spindle driving shaft 17, as more clearly illustratedv in Figures 3 and el; ot the drawings.

liounted central y in the front and rear walls; o1E the pinion housing', i a main drive sliatt 65, journaled in stationary bearings 00, having` iiinlcn roller bearings 07, and each having retainingv nut 08 and dust cap 09 Ytor fielding the roller bearings in position.

gear 7 0 is keyed to the main drive shalt between the bearings 6G, for meshing with piniong; 59 mounted on drill-spindle drir j shafts 7. T o th outer end ot each oi" the bearing` members 57, is formed a T-siot as 71 tor the reception ot the T- shaped head 72. ot the wheel screw bolt 73, controlled by hand wheel 7-1. By turning` the hand wheel Til to the right or lett the bearing' member 57 may be raise( or lowered as desired, to throw the pinion 59 out, or into engagement with the vmain drive gear 70. .r; will be noted by reterrin;v to Figure 3 ot the drawings l have allowed considerable space between the outer ednjo oi" the pinions 59 and the central Yall ot the hearing); inembcrs 57, thereby allowing a considerable change in the ot' gearing' used when a di'li'ercnt drivingr speed is desired.

jr bed-plate 7 5 is .mounted on the rear end ot the machine`r upon which adjustably secured a niotoi: 0, having a shaft 77 coupled as at 7S, directifY to the main drive shaft 05, thereby furnishing' a direct drive for the main drive shait.

The tront end frame 3 ot the machine carries a vertical slideway 79, upon which is mounted the work receiving table 80, having the usual adjusting` screw support S1 and hand wheel 82 for raising` and lowering the worlr receivingtable.

A clamping' block 83 is mounted upon the work rccei table and is rigidly held in position thereon by having lugs Si, which project from the base ot the clanipinn' block 92 into slots 85 in the table and bolts 86 are screwed into the lug,` projections thereby rigidly securing' the clampingblock S3 upon the table. The slots 85 being consid-- erablv longer than the projections Sil, allows the clamping' block to be adjusted transversely ot the table by means oiE the bolts SG, as clearly illustrated in Figures 141-, 15 and 19 ol the drawings.V

T-shaped guide-way Si'. toi-med in the top ot the clmnpinn` block S3, in which two yguide blocks S9. 99 are mounted each having' a pair of upwardly extending ears 90, between cach ot which the end of an E -shaped stop or gage 91, is pivoted by means ot a bolt 92. To the ends of each bolt 92 is keyed a hand lever 93 for operating the gage or stop 91, and having` a counter-weight 94, attached `thereto for holding the more securely in its raised or lowered position. llach stop or gage is made to reciprocate longitudinallyv ot the table by means ot teed screws 95, ojorated by hand wheels 9G, -or settingv tl ci stops or gages 91'in the desired position.

@n one side of the clamping bloclf: 83 is an integrally formed projection 97, being grooved on its under side as at 98, and having on its side face vertical notches 99, and a longitudinal dove-tailed recess 100 'for receiving the dove-tailed projection 101 of the contact face plate 102. The inner lower s, rtace ot the vertical notches 99 are inclined to Contact with the heads of the wedge-bolts 103, the threaded ends of which extend above the ends of the notches and have nuts 101 thereon. By this manner ot securing the contact tace plate 102 to the projection 97,the contact face plate may be adjusted longitudinally and securely locked in any desired position by means of the bolts 103. A slot 105 is termed in the tace oia the projection 97 and eitends longitudinally nearly to the ends thereof, connecting the groove 98 with the dove-tailed recess 100 and registers with the holes 100 in the Contact tace plate 10?.l through which the drills project at the end of the working stroke.

Mounted upon the dove-tailed projections 18, at each side of the carriages is a bear-innv or support 107, each having,Y bolt S extendingthrough a hole 109 in each ot the upper portions thereof. These bolt heads abutting` against the side of their respective bearing, the lorward end ot each bolt being screwed into the movable clamping` block 110, and a helical spring* 111 surrounds the body of each bolt 108. @ne end of the helical spring*` engaging the side ot the movable clamping block, while the other end is seated in asoclret 112` in the bearing` or support 107, thereby holding the movable clamping' block 110 always in an extended position. The lower portion ot each ot the bearings or supports are ci similar construction to the lower portions oil the drillspindle journal bearings 19, having` a dovetailed groove in their undersidcs for receiving the dove-tailed projection `18, and are adjustable laterally by means of hand wheels 113, having a shaft 114, upon which is mounted a pinion 115, meshing with the rack Q3, and a set bolt 1161er holding the bearing' against displacement. Each ot the novable clamping' blocks 110 has its contact face constructed similar to the faces of the stationary clamping' members. having' longitudinal dove-tailed vgrooves 117, for receiving` the dove-tailed projections `118 of the Contact tace `plates 119 and, vertical grooif'es 120, with inclined inner lower faces for thc reception at the Wedge bolts 1.21, and are held in iiiosition by means ot nuts 122. The movable clamping' blocks are also slotted as at 1222l and the contact tace plates 1119, haie holes 121, tor' the passage ot the drills.

Each carriage is advanced by means oi;

:i fluid pressnre cylinder 125, and retracted by a pull hack cylinder 121i. ri piston 127 reciprocates Within each ot the fluid pressiire cylinders and have their forward ends abutting` against the downii'ardly extendingi harig?y 128, ot the carriages, and pisiions 129,

A reciprocate Within each ot the pull back cylinders 126, their Aforward ends projecting through a hele 130 in the extend- ;tlang'es 128, and is attached to the .tor-

niard end of the pistons 127, and a collar 131 near the forni ard end the pistons 129 abuts aga-inst the ilang'es 128 ot the carriages on the opposle side to that or the pistons 127. In this manner the forward ends of the pistons are secured directly7 to the flanges of the carriages. The tluid pressure cylinders 125 and pull back cylinders 126 have outwardly extending Vieh members 132, with downiiiaidlj.T flanged outer ediles 123, adjustahly attached to the traine members 4 and 8, by bolts 15,4, which pass through slots 135, in the lianged edges therein;i allowing for adjustifient.

ln Figure il l have illustrated a reciprocating' ai-ringo 1516, withoiiit having: lateral moans ot adjustment. The iilovotailed projection 137, is 'termed integral with the bed o i5 the :arriaggc and the doiiinwariilly proicctinif tiener. 1519. to which the pistons are r.) n .red is torinei'l centrally on the carriage,

trolling means Yfor reciprocatine` the carriages, and as a set oi similar connections are used 'tor ach carriage a description ot one set Will apply to both. The inain 'fluid siinplj.i pipe is indicated as 139. having;` a Valve 14:0, Jfor cutting ott the liiiiiil supply to thc machine at will. Branch pipes 111 and 112. :end from the main supply 1539. The pipe 1111 entends to the cud ot the pull back c'iiliniflei 126 and has a controlling salve 1l?) mounted. thereon. and pipe 14:2 extends Yto the tiiiid pressure cylinder 125 and l a controlling valve 144;, and adjustinfr valve 145 mounted thereon.

'llfhcii the adjusting rame 145 is opened slightly, the 'forward feed the carriage will be verf! slow and 'as the valve opened the forward Ylic-ed of the carriage will increase.

The controllingi Valves lll-3 ane 141 are tliieeff iii valves, ha., -ted in Figure Ly have as shown in this ligure a eii ls heine; siotted :isnt 1F rllhe slotted enos oi the links 1119, 15() and 152 are connected together by means oit holt 155, which also passes through a link 15G, to

which is attached a helical spring;` loi, the opposite end ot the helical spring; beingV attached to the Vtraine ol tte machine, as at 158. rllhe operating` shafiit 153?, has s bearings in extensions 159 o'ii the top side trames l and extend tl'ieiethroiigi'h on eit ier side oi the machine. (ln one end et the operating shaft is attached an operating lever 1GO, havingP` socket 161 in its upper end 'tor the reception ot a spring;- 162, tor projecting' the shank 165i oit a handle 16.41, to which is attached a roller 165, tor engrais. a notch 166 in a catch 167, which is made adjustn able by the bolts 168, passing through slots 169. The shank 163 ot the handle 164: eX- tends into the socket 161 and is normally projected bf; means oit the spring 1 and is limited in its movements by means et a pin 17 O, Working' in a slot 171 in the side or" the operating` lever 160.

ingr an inclined lower surface 173, 'lor entlie upper end 174, ot the shank 163,

Vtor thi-onine' the operating lever 1GO out of engagement `with the notch loG. This plate 172 is made adjustable by means ot the bolts 175 which pass Ythrough slots 176 in the plate. by means ot which the plate may be adjusted to give a longer or shorter workinn` stroke to the carriaoje.

To the opposite end ot the operatingf shaft. to that on which the operatine` love;l is attached is secured a hand lever 177, for thc purpose oit throwing thc operating lever into engagement with the :notch 166. troni either side oil the machine.

,ln operating.' my inachii'ic l pie'ler to eX haust the tliiid pressure trom the cylinder through :i connection 173 into the movable clamping head. which has z tubular opening' therein as at 179 and jet openings 180, so that the drills maj,i he quenched or cooled at the end ot the working' stroke.

lloteiring i'ioir to thc modification and details illustrated in Figures 20, 2o and 26. in which have shopT an upright ma'A chine instead. ot a horinzontal one and in which the ca iriafje and parts mounted thereon are ot similar construction to the ones described hcreto-tore2 as are also the spindlecounlings the moraine clamping; heads and.

the fluid pressure means and controlling mechanism and these will be given the same re terence numerals as for the horizontal machine.

ln this modification 161 indicates the base trame oi. the machine having a vertical slide .vay 182 upon which is mount-ed the work receiving table 183 having centrally iormed transversely on its upper a` dove-tailed groove 161 to receive the dovetailed base 165 of a gage or stop 166. T- notch termed in the end ot' the stop or gage 186, 'tor the reception or the "lend of a leed screw 16?, extending' 'through a threaded opening,y in the bracket 186 and operated by means ot' a hand Wheel l1.89, on its outer end.

the base 'trame 181, are two vside 'trames 190 and a central iframe 191, having slide Ways 192, on'each oit the same. Near the up ier ends o1n the side trames 190 and the central trame 191 are mounted a pair olf pinion housings 193, each comprising' a casting` having a liront wall 191 ivith a flange hase 195 attached to the trames 190 and 191 and side Walls 196 formed integrally therewith and a rear Wall 197, made or" a flat plate which 'is attached to the front Wall casting by means of bolts 19S.

Mounted centrally in the pinion housings is a main drive sha't't 199, which has lreyed thereto the main driving` gear, which meshes with the unions mounted on the c rill-spinvdlo driving shafts which are journaled in the bearing members. This construction being the same as above described and illustrated more t'ully for Figurer` and et the saine re'lcrence numerals will he lgiven them and a detailed description is not thought lieeessary. In this construction I have shown clamping` 'Wedges 200, at the sides ot the drill-spindle journal bearings which are adjustable by means ot a. setbolt 201 which. can he adjusted to take up any Wear that may occur. so the hearing' will valways be held in a rigid position.

Mounted on a bracket above each. pinion housingr is a motor 202. the shatt ot each of which is connected directly to the main drive sha'tt 199.

In this construction it will be noted that thc main driving' shat't and the drill-spindle drivingr shafts are all in thc saine alilnment, so the coupling shafts can be rotated in a substantially vertical position thereby yreducing; the Friction and Wear on the universul joints.

In Fiets. 19 and 21 I have illustrated a motor drive construction which I may use with this machine in which a motor 203, having a bevel gear 204 keyed to they outer end. of the vmotor shaft and meshes with bevel gear 205.l attached to the upper end oit the main drive sha'tt 199.

llh'en the drill-spindle is attached to 'the main drive shaft as illustrated in Figure 20 it is obvious that the drill-spindle et the main drive shaft will rotate in the opposite direction to the drill-spindles on either side thereot and in this casev right and left drills Will have to be used.'

In Figure 30, I have illustrated a. modied by means of a lever 214i, )ivoted to the' gage 186 at 215 and 4to an extending bracket 216 onthe Work Vreceivingtable as at 21'?, and in Figure 22 I have illustrated another slightly modified `form 4oi. clamping' mernbe'1. 1 and gage which I may use with an upright machine in Which the rail 218 is Ated to the machine on its side and Irests on a Contact `:tace plate 219 Which has a dove-tailed nrojection' 220, extending into a dove-tailed re` cess 221 inthe integral projection 222 er(- tendng from the vside ot' the clamping block. The Contact face nlate 219 is held in position by means of the Wedge bolts 223 'and 2211 is mounted centrally on the York receivingr table which can be raised and lowered as desired. otherwise the constrno tion is similar to that shown `and. described in Figures 14, 15, V16 and 19 ot the dravw inas.

The operation ot inv machine is :is Atolloivsz-assuminc; thatthe parts ot the anparatus are in the position shown in Figures 1 and l2 ot the drawings. the upper ends ot the operating' lever 160 for controlling? the supply of fluid pressure. to and from the cylinders tor reciprocating the carriages' enthe notches 1.66,'the alves being; in the position illustrated Yin Fixture 31. with valves 147-3. extendino'to the pnll-.baclccvh inders in the exhaust position and with the valves 1411 open. for allowing' tluid pressure to pass throuch pipes 142 to the fluid pres sure cylinders ther-obv advancinfr the carriages with theiranidly rotatingdrills mounted thereon together with the movable clamping hlocls 110. until the contact tace plates 119K ennemie the side ot the rails to he drilled. and as the carriages continue to advance they compress the springs 111. therebv holdin@ the 'rail or rails securely between the movable clamping' blocks 110 and the contact face plates 102. of the stationarj.r clampingr bloc-lt 83. As thel carriages con` tinu'e to advance the drills pass through-the ings arranged around the periphery of the central driving gear and meshing therewith, connections between the drill-spindle driving shafts. and the di'ill-spindles` means for throwing the drilljindle driving pinions into or out of engagement with the central driving means for adva-iicingthecars, and means for automatically retractc in a drilling machine, comprising a freine, slidefways formed thereon, a pair of 'arriages arranged side by side mounted on the slideavavs. an adjustable face plate on each ce. -ll-spilrlles journaled in Vadjustable mounted on the adjustable face plate of the carriages, a main drive shaft for rotating the drill-spindles, means for tit-rowing the drill-spindles into and out of engagement with the main drive shaft, and fluid pressure means for advancing and retraeting the carriages.

ln a drilling machine, comprising a frame, slideevays formed thereon, a pair of carriages arranged side by side mounted Von the slide-ways, drill-spindles journaled in adjustable bearings mounted on the carriages, adjustable supports mounted upon the carriages. a clamping member supported b v the adjustable supports, a main drive shaft for rotating the drill-spindles, means for throwing the crill-spindles into and out engagement with the main drive shaft,

or fluid pressure means for advancing the carriages, and fluid pressure means for automatically retracting the carriages at the end of the working stroke.

(3. lu a drilling machine, comprising a frame, slideovays formed thereon, a pair of carriages arranged side by side mounted on the slide-ways. an adjustable face plate on nach carriage` drill-spindles journaled inr adjustable bearings mounted on the adjustable face plates of the carriages, adjustable supports mounted upon the face plates, a clamping member supported by the adjustable supports, a main drive shaft for rotating the drill-spindles, means for throwing the drill-spindles into and out ofy engagement with the main drive shaft, fluid pressure means for advancing the carriages. and 'fluid pressure means for automatically retracting1 the carriages at the end of the working' stroke.

T. ln a drilling machine, comprising a frame, slide-ways formed thereon. a carriage mounted on the slide-nays, drill-spindles journaled in adjustable hearings mounted on the carriage, a pinion housing mounted upon the frame, a main driif'ing shaft having a gear mounted. thereon journaled in the pinion housing, a plurality of drill-spindle driving shafts mounted in niovable journal bearings in the pinion housing, each 'having a pinion mounted thereon meshing` 'with the gear on the main driving shaft, a connection between each of the drill-spindle driving shafts and the drill-spindles. and means for throwing the pinions on the li'illspinrlle driving shafts into or out of mesh with the gear on ti e main driving shaft.

ln a drilling machine, comprising aV drivingshafts and the drill-spindles, afwheel screw bolt attached to the movable bearings of the drill-spindle driving shafts for throwinn' the pinions thereon into or out of mesh with the gear on the main driving shaft, and means for advancing and retracting the carriage.` Y

9. ln a drilling machine, comprising a pinion housing, a main drive shaft having a rear mounted thereon journaled centrally in the pinion housing, aV plurality of dril'll spindle driving shafts each having a pinion mounted thereon forA meshing with the gear on the main drive shaft and journaled in niovablebearings in the pinion housingarranged around. the periphery of the gear on the main drive shaft, said movable bearings for the drill-spindle driving shafts having'Y bosses extending therefrom into slots in the pinion housing'. a wheel screw bolt having' its inner end attached to each of the movable bearings of the drill-spindle driving shafts, and each wheel screw bolt extending through a threaded opening in the pinion housing, anda hand wheel on the outer end of each wheel screw bolt for throwing the pinions on the drill-spindle driving' shafts into oi' out of mesh with the gear on'tlie'main drive shaft.

l0. in a drilling machine, comprising a- 'pinion housing. a in ain drive shaft having' a gear mounted thereon journaled centrally in stationary' bearings in the pinion housing, a plurality of drill-spindle driving; shafts, each having a pinion mounted thereon for meshing; with the .Q'ear on the main drive shaft and journaled in movable bearings in the pinion housing' arranged around the periphery' of the gear on the main driva shaft, slideovavs formed in the pinion housing foi' the reception of the movable bearings for each of the' drill-spindle driving shafts, bosses extending outwardly therefrom into slots'in the ypinion housing, and` a wheel screw bolt attached 'te each of the movable ll l) (ill ot adjustment similar to the drill-spindle journal bearings, a socket in the upper end ot' each adjustable support, a bolt passing through the socket of each adjustable support, a clamping member attached. to one end ot each bolt, a spring surrounding the intermediate portion oit each bolt, the ends ot' the spring engaging the clamping member and the socket, means ter simultaneously shitting` the :tace plate with the drill-spindle bearings and adjustable supports mounted thereon laterally ot the carriage, an operatinglever for engaging an adjustable notch on the stationary traine tor controlling the fluid pressure tor advancing the carriage, means on the carriage Vtor releasing the operating lever trom the notch tor automaticallv retracting the carriage, and connection between the fluid pressure cylinders and clamjing member for exhaustingA the tluid pressure into the clamping member.

18. In a drilling machine, comprising a stationary trame, slide-Ways termed thereon, a pair ot carriages mounted on the slideways, drill-spindles journaled in adjustable bearings mounted on the carriages, means tor rotating the drill-spindles, adjustable supports mounted upon each carriage, a clamping member on each carria resiliently supported by the adjustable supports. tluid pressure means tor reciprocating each carriage, and means controlled by the advancing movement ot each carriage tor automaticallv retracting both carriages either separately or simultaneously, substantiallj,T as described.

19. In a drilling machine, comprising a Work receiving table, a stationary clamping hloclf mounted thereon. means ttor securing the clamping block to the work receiving table, a stop mounted on the work receiving table.y a contact tace plate attached toene side ot the clamping block, a stationary trame. slide-Ways Aformed thereon, a carriage n'iounted on the slide-Ways opposite the sta-- tional-3,' clamping block, drill-spindles journaled in bearings mounted on the carriage, means tor rotating the drill-spindles. adjustable supports mounted upon the earria-ge` a clamping member resilientljY supported bj* the adjustable supports. tluid pressure means for reciprocating the carriage,

and means controlled by the advancing morcinent ot the carriage tor automatically ing shaft and tor rotating the plurality ot f'lrill-spindles, and mea-ns tor throwing the drill-spindles into or out ot engagement with the main drive shaft.

2l. In a drilling machine, comprising a tra-me, slide-Ways termed thereon, a carriage reciprocated by fluid pressure mounted on the slide-Ways, a plurality ot drill-spindles each journaled in an adjustable hearing mounted on the carriage, a pinion housing, a main drive shaft journaled in the pinion housing forming a direct drill-spindle driving shaft having a gear mounted thereon, lrill-spindle driving shafts having pinions mounted thereon tor meshing with the gear on the main drive sha/tt journaled in slide- Ways termed in the `pinion housing, universal coupling connections between the drill-spindle driving shafts and the drillspindles, and means for throwing the pinions on the drill-spindle driving shaftA into or out of engagement with the gear on the main drive shatt.

22. In a drilling machine, comprising a t'ame, a slide-way Yformed thereon, a carriage mounted on the slide-Wav, a drillspindle journaled in a bearing mounted on the carriage. a pinion housing mounted on the 'tra-me, a main drive shaft Jforming a direct drill-spindle driving shatt journaled in the pinion housing having a gear mounted thereon` a. drill-spindle driving shaft having a pinion mounted thereon meshing with the gearl on the main driving sha'tt and journaled in a bearing adapted for radial adjustment in slide-Ways formed in the pinion housing, a connection hetween the drillspindle and the drill-spindle driv'ng shatt, and a hand screw bol-t attached to the bearing tor throwing` the pinion mounted on the drill-spindle driving shatt into or out ot engagement with the main driving `gear.

2?). In a .drill-ing machine, comprising a trame, a reciprocatingy carriage, a drill-spindle journaled'in a bearing mounted upon the carriage, a pinion housing. mounted on the .r"iame,`a main drive shatt toi-ming a direct drill-spindle driving sha'tt having a gear thereon journaled in the pinion housing, a drill-spindle driving` shaft mounted in a journal bearingadapted to he reciprocated in a slide-Wav terme-d in the pinion housing and having a pinion thereon meshing with the gear on the main driving shal n connection between the drill-spindle d riving shatt and the drll spindle, and a hand screw holt attached to the journal bearing for throwing the pinion on the drill-spindle driifing'shaft into or out-vot mesh with the gear on the main driving'shatt.

24. In a. drilling machine, comprising a trame, slide-Ways formed thereon, a reciprocating carriage mounted upon the slidewajvs, a plurality of drill-spindles journaled in'bearings mounted.H upon the carriage, a

pinion housing mounted upon the frame, a niain drive shaft formingr a direct drillspindle drivingv shaft having a gear thereon journaled in the pinion housing, a plurality el? drill-spindle drivingv shafts journaled in ear-ings each adapted to be reeiprocated in slide-Ways formed in the pinion housing., a pinion mounted on each of the drill-spindle drivin? shafts meshing' with the gear on the main drive shaft, a connection between eaeh of the drill-spindle driving,r shafts, and the drill-spindles, and hand screw bolts attached to the journal hearings for throwing theY pinions on the drill-spindle driving shafts into or out oit mesh with the gear on the oriving shaft. j

25. ln a drilling machine, comprising a iii-aine, slidesivzivs formed thereon, a can ringe automatically reciprocated hy fluid pressure mounted on the slide-Ways, a plurality oi" drillsoindles ournaled in hearings mounted on the carriage, means for adjusting all of the drill-spindle journal hearings simultaneously, a drive sha-tt .iorniingV a direct drillspindle driving shatt havingr a geur mounted thereon, drill-spindle driving shafts having pinions mounted thereon ttor meshing* with the gear on the main drive shaft, connections between the drillspindles und the drill-spindle driving; shall-s. and e, sferen7 feedingy means torthrorvino the pin-- ions into or out oi mesh with the gear on the main drive shaft.

9,6. ln n drilling machine, comprising n frame, slide-Ways formed thereon, a carriage reeiproeatcd by fluid pressure mounted on the slideswayst.y a pluralit,7 et drillspinf dies eaeli journaled in an adjustable hee-,ring niounied on the Carriage means for adjustinte' the drill-spindle journal hearings sep-zr rntely or in multiple at one oper:l ein independent ol the Vearria 51e, a ninin drive shaft ioriningf a direct drill-spindle vdrivingr sha'it journuled in a stationary hearing iu a pin'- iou housing having: a lfear n'iounted tliereoin drill-spindle irinof shafts journaled in niovuflilo kheal-limes in the' pinion housing1 pinions mounted thereon ior meshing; with the ,geur on the main drive shall; u universal coupling' connection between euch oi" the "l-spindle oi'viugx slnil'ts and the dri spindles and means for` thro ving the pinions the drillspindle driving shs'tl's into or out oi: mesh with the geur on the main drive vsl ni it.

I 5 Vnaled in the pinion housing, a 1

gear mounted upon a driv drillepindle driving shafts oui-nale hearings adept-ed to be adjuslel i ways formed in the pinion housing arranged radialljT around the periphery oi the een tral driving gear and meshing therewith., connections between the drill-spindle driving shafts and the drill-spindles, and screw feeding' Ineens for throwing the drillfspindle driving pinions ii to und out oi engage nient with the een ral driving gema ln drilling inuehine, comprisinga frane, slide-ways formed thereon, :i pluralitjT of carrinoes reeiprorated by iluid pressure mounted on the slidewsays. a plurality of drill-spindles journslod in heerings mounted on erich of the Vn'ieans for adjusting the drill-spindle jour nal hearings seizarefi'elj7 or in uiuitij'ile at one operation independent ot 'the carriage, a,

inuin drive spindle drivingA shaft for rotating' on spindles, and nieans for throwing the drillspindles into and out oi? engagement with the main drive shaft.

In a drillingr machineV` comprising a freine, slidevays formed thereon, s, plurality of carriages mounted on the slide-- nf'avs, duid pressure means for edvanein;- and retractiii the carriages, a plurality ot drill-spindles journaled in hesrings mounted on each ol: the carriagesnv ineens tor adjusting` the drill-spindle journal hearings sejt P rately or in multiplo at one operation inde pondent ot the carriefe` e main drive sha 1 iiorniingj n direet drillspindlo driving sini' VFor rotating the drill-spindles, und screw shaft Aiorming a direct ,L l

the drillfeeding; means Yfor throwing the drili--spiir dlos into and out ol. enmigoiuent 'willi the `arateljv or in inultiple at one operation inv dependent of the carriages, a main drive .sliatt formingY :i direct drill-spindle driviuo shaft ifor rotating the drillspindles und :i screw 'feeding' means ior throwing` the d -il spindles into e., d out ot engagement with the main drive shaft.

3l.. ln e drilling ,meehinen eomik'irisinn' a frame, slide-Ways formed thereon, a plurality o carriages mounted on the slide- Wajis, a plurality of drill-spindles journaled in bearings mounted on each of the earriages, means for adjustingr the drill-spindle loo l ill 

